The area code 314 is designated for the city of St. Louis and its surrounding regions in Missouri. It was one of the original area codes established in 1947 and covers parts of St. Louis City, St. Louis County, and some nearby areas. This area code is significant for its historical and cultural importance, as St. Louis is known for its iconic Gateway Arch and vibrant music scene. The 314 area code serves as a vital communication link for residents and businesses in this urban area.